Home / 13,123.08-18,109.83-7,154.75

Finding the Fourth Proportional to 13,123.08, 18,109.83 and 7,154.75

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Solution

The fourth proportional to 13,123.08, 18,109.83 and 7,154.75 is: 9,873.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,123.08 : 18,109.83 = 7,154.75 : x
  2. Step 2: Convert to fraction form
    13,123.08/18,109.83 = 7,154.75/x
  3. Step 3: Cross multiply
    13,123.08x = 18,109.83 × 7,154.75
  4. Step 4: Simplify right side
    13,123.08x = 129,571,236.18
  5. Step 5: Solve for x
    x = 129,571,236.18/13,123.08
  6. Step 6: Final answer
    x = 9,873.54

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.